MIDDLETOWN >> Wesleyan University has barred a fraternity from hosting social events and imposed other sanctions following reports of sexual assault at its chapter house.

University officials sent a campus-wide email explaining that, after reports of sexual assault at the Psi Upsilon fraternity’s Xi Chapter house in 2011 and 2013, the university has put the fraternity on provisional program housing status — probation — through the end of next year.

In the email to students, university President Michael Roth and Vice-President for Student Affairs Michael Whaley wrote that a “student was dismissed from the university after being found responsible for sexual assault at a Psi U event in the spring of 2013.”

Recently, said Roth and Whaley, a student reported another sexual assault that had taken place in 2011, “and the assailant was dismissed from the university.”

“Although this latest reported incident took place three years ago, when most current residents of the fraternity were not yet associated with the organization, some sanction of the fraternity is appropriate,” said Roth and Whaley. “The fraternity will not be allowed to hold any social events during this period, and any violation of university regulations by the organization or its members during this time will result in loss of program housing status and the house becoming off-limits to students.”

The university’s social event policy outlines certain circumstances under which students or organizations must register their events with the university. It also spells out alcohol guidelines and restrictions during quiet or courtesy hours.

There is, however, no explanation for what, specifically, constitutes a social event. Univeristy officials clarified that Psi Upsilon is forbidden from hosting any social events - not only those that require registration - but, as of Tuesday night, have yet to outline precisely what constitutes a social event.

This would not be the first university embargo on students entering a fraternity house. In September, Wesleyan declared that students were no longer allowed to live at the Beta Theta Pi chapter house, following an incident where a sophomore fell from a third-story window.

In their email, Roth and Whaley continued that “this action is consistent with our policies to support survivors, punish assailants and change the culture so as to eliminate elements that lead to sexual assault. To be clear, sexual assault is not only a problem of Greek organizations; it is a problem on campuses all over the country.”

“In addition to taking action against individuals found to have perpetrated a violent act, any campus-based organization that has sponsored events that create conditions with a higher risk of violence, including sexual assault, also will be held accountable,” said the administrators.

A request for comment delivered to the Xi Chapter’s general email address went unanswered Tuesday.